Question Why do I have a black screen

[Charliegmc]

My pc is turned on and all its just that my screen is black, my monitor recognises the pc as when I plug it in the light on it goes green but then it says 'no signal' I suspect it has something to do with he fact that I had effectively unplugged everything and plugged it back in but I am not 100%

 

[rgd1101]

something failed?

full system spec? include make and model of the psu

 

[Charliegmc]

Thanks for the quick reply
Nvidia geforce gtx 1050 ti
I5 4590k
Not too sure on the motherboard
PSU just says ATX 500b

 

[Charliegmc]

It's weird because everything was working fine earlier today